Piston-ring construction



April 13 1926.

J. L. masons PISTOITRING CONSTRUCTION Filed Dec. 18, 1924 z-shets-shut 1 INVENTOR 17072701 Gi/lvson ATTORNEYS Patented Apr. 13,1926.

Jenn, enason or Baoo nYannw some. i

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Application filecl- December 18; 1-924. 1 serial Heated/F60:

7 To all who/n it wmy concern."

Be it known that Ig- JOHN L.'GIBSONT,;&

citizen of the Uni-ted Sta-tes,'a1 1d a resident ofthe city of New York, borough of Brook lyn, in, the county of 'li ngs and State of New -York, have invented anew and Improved PistoneltingGonstructiom of which the following is a full, clear; and: exaodde scription. r

This invention relates to a construct-ion of piston ring. An object of the invention is to. provide a simple and eiiicient consti-uetion whereby substantially all types of pistons can be altered to utilize my invention.

Another object concerns the provision of means whereby as the piston'rings and their grooves become worn they can be readily replaced.

A further object concerns, the provision of means wl'iereby tlie replacement ofpi'ston ,7

Fig. 5 is a perspective view of a connecting block disposed between portions of the piston rings;

Fig. 6 is a horizontal section taken on the line 66 of Fig. 7 and Fig. 7 is a vertical section taken on the line 77 of Fig. 1. I

The form of the invention shownin the drawings is a. preferred form, although it is understood that modifications in the construction and arrangement of the parts and in the character of the materials used may he adopted without departing from the spirit of the invention as set forth in the appended claims.

In general the invention comprises a plate, preferably ringike adapted to be disposed against one end of a piston. This plate is provided with a peripheral, de endent flange in the outer surface of whic ring:

receiving grooves are formed. This flange is adapted to fit into a recess formed by re ducingthe end of: the piston in diameter against which theplate hearsso as to. receive 7 the, flange. The plate is then boltedi. against the end of the. piston. The ring-receiving grooves are oon'nectediby suitable-passages to the end of the pistonso that steam. is. admitted into the grooves. Preferably the grooves: areseparated. by a. partition. or wall; and each groove has inits bottomi a central rib or chime through which the above-men.- tioned passages-extend-L I V Preferably the ringsjare formed int-two half sections to forma complete "ring; These rings, in cross section; are preferably 7 la shape with the limbs of the U extending rearwardly and lying on opposite sides of the oentral ribin the groove; The-rings blocks having portions which interlock with the ends of the ring to make tight joints;

v 1,581,053 unites stares rat ear entice.

are also pi 'ereed or aperturedto permit the and the blocksare provided with means for holding them tightly inco-operative relation with the ring.

I The preferred form of the invention is shown in the drawings. In accordance with the invention there is a piston 1 the upper end of which is reduced in diameter to provide shoulders 2 and 3. To this end of the piston a ringlike plate l is attached, this plate having a dependent, ringlike flange 5, this ringlike flange 5 having ringreceiving grooves 6 and 7 in its outer face.

The plate 4: is attached to the end of a piston by means .of bolts 8. This plate is provided with steam passages 9 which extend downward into the flange 5 and outward through the ends of the chimes, such as 10 and 11, formed in the bottom of each ring-receiving groove 6 and 7. There are a plurality of these steam passages. The grooves 6 and 7 are separated by a wall or partition 12. Each of the rings such as 13 are U-shape in cross section with the limbs 14 of the U extending rearwardly on opposite sides of the chimes to make a tight joint. Each ring is made in two sections. The adjacent ends of these sections are brought into co operative relation with the block (see Fig. 5). This block has a base portion 15, a central wall adapted. to he in alignmentwith the chimes, and aprojecting lug or head 17 adapted to lie in alignment with the ends of the ring. The adjacent ends'of the ring are slotted to partially embrace the head 17, as shown in the figures. V V

The bottom of the flange 5 is provided with a circular groove 18 which is connected by apertures 19 tothe bottom 11 to function in a manner similar tothei steam passagesz9.- This groove is connected by a plurality of vertical passages suchas 20,

flange can be equally-lifted off the end of the piston soas to 'removethe rings and their grooves. These can be readily replaced atflwill in the grooves separated from the piston and then put back into place merely by placing the flange and plate in position and bolting them to the end of the piston. '1 g y In this manner any. standard piston can be altered very slightly to adapt it for use in connection with'this particular construction of ring-receiving unit.

What I claim is:

1. A piston ring construction which coinprises in combination a piston having a ring groove, a central chime in said groove, a U shaped ring section lying in said groove with its limbs extending rearwardly to bear against the upper and lower faces of the said chime, the chime being cut away along those portions wherethe ends of the ring sections lie and a connecting block disposed in the groove, said block having a base to lie against the bottom'of the groove, a wall projectingfrom the base to fill in where the chime has been cut away, and a tongue projecting from the wall, the ends of the ring sections belng slotted to recelve said tongue.

2. A connecting block forsectional piston rings which comprises a base to lie in the piston groove and bear against the rear face of. the ring sections, a wall portion, projecting from the base portion and adapted part of a chime in the piston groove, and a tongue portlon PTOjBCtIIlg from the wall to fill in a gap formed bycutting away a i portion to lie in slots formed in the ends of the adjacent ring section.

IJOHNL. GIBSON. 

